Melanie Bloom is a woman with a message. she`s speaking about her husband, NBC news reporter David Bloom who died in Iraq from problems linked to Deep Vein Thrombosis or DVT. DVT occurs when a blood clot forms in a large vein, usually in the leg. It could result in a pulmonary embolism. Risks factors include restricted mobility, long distance flights and dehydration. For more information click on the web link provided.